Laufenburg District is a district of the canton of Aargau, Switzerland, essentially consisting of the upper Fricktal valley in the Aargau Jura south of the Rhine. Its capital is the town of Laufenburg. It has a population of 33,279 (as of 31 December 2020).

The Laufenburg district has an area, as of 2009, of 152.56 square kilometers (58.90 sq mi). Of this area, 75.05 km2 (28.98 sq mi) or 49.2% is used for agricultural purposes, while 59.85 km2 (23.11 sq mi) or 39.2% is forested. Of the rest of the land, 15.9 km2 (6.1 sq mi) or 10.4% is settled (buildings or roads).